Hi mate, this is my story: While I was studying some websites, I discovered a site seems using some 'blackhat' method to make the link invisible but I could not figure out how they can do this. So, I bring it here to see any people to help me for doing some investigation. The URL is hxxp://www.bradleycentersports.com. In the source code, you can find a div tag with id='fbb' and all the links & anchor text within this div tag get invisible. I've looked its CSS files but didn't find any 'fbb' footprint. I'm really curious about how they can do this. Please note that this site have PR5. Thanks.